85804215705 has 40 divisors (see below), whose sum is σ = 165643704072. Its totient is φ = 42242072832.

The previous prime is 85804215667. The next prime is 85804215767. The reversal of 85804215705 is 50751240858.

85804215705 is a `hidden beast` number, since 8 + 58 + 0 + 4 + 21 + 570 + 5 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 331776 + 85803883929 = 576^2 + 292923^2 .

It is not a de Polignac number, because 85804215705 - 2⁷ = 85804215577 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 8143284 + ... + 8153813.

Almost surely, 2^85804215705 is an apocalyptic number.

It is an amenable number.

85804215705 is a deficient number, since it is larger than the sum of its proper divisors (79839488367).

85804215705 is a wasteful number, since it uses less digits than its factorization.

85804215705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16297127 (or 16297118 counting only the distinct ones).

The product of its (nonzero) digits is 448000, while the sum is 45.

The spelling of 85804215705 in words is "eighty-five billion, eight hundred four million, two hundred fifteen thousand, seven hundred five".